Environmental aspect control assembly

ABSTRACT

An environmental aspect control assembly is configured to control one more environmental aspects. The environmental aspect control assembly may include at least one aspect-controlling portion formed of one or more environmental aspect-controlling materials, and at least one shape-changing actuator operatively connected to the aspect-controlling structure(s). The shape-changing actuator(s) is configured to have a first actuator shape at a first temperature and a second actuator shape at a second temperature that differs from the first temperature. The first actuator shape causes the aspect-controlling structure(s) to form a first structural shape. The second actuator shape causes the aspect-controlling structure(s) to form a second structural shape that differs from the first structural shape.

BACKGROUND OF THE DISCLOSURE

Embodiments of the present disclosure generally relate to anenvironmental aspect control assembly.

As an airplane is operated, condensation typically occurs during variousphases of flight. During aircraft design and manufacture, specialconsideration is given with respect to the potential of moisture withinthe airplane, so as to ensure that corrosion of various internalstructures, short-circuiting, arcing, and/or degradation of electricalcomponents, and the like, does not occur. In general, condensation isdirectly related to environmental conditions within an interior cabin ofthe airplane, and indirectly related to ambient conditions outside ofthe airplane when grounded. Passengers, crew, onboard meals, and onboardbeverages may contribute to condensation within an airplane.

Water accumulation due to condensation occurs in both short and longrange flights, but is generally more severe and excessive in continuouslong-range flights over six hours having quick turn-around departures.Accordingly, various systems and methods have been developed to controland manage condensation within an airplane.

Many airplanes include various moisture management devices to minimizeor otherwise reduce moisture within an interior cabin. For example,drainage paths within various structures, moisture impermeableinsulation blankets, zonal air dryers (such as dehumidifiers), humiditycontrol systems, and moisture management devices are used to captureand/or direct moisture away from an internal cabin interior and divertthe moisture to a bilge, through which the moisture drains overboard viapressure valves.

As can be appreciated, however, the various moisture management devicesadd weight and cost to an airplane. Further, installing the variousmoisture management devices increases manufacturing time.

Additionally, various moisture management devices may not be able toabsorb excessive amounts of moisture. For example, as an absorptivematerial exceeds an absorption limit, excess moisture may leaktherefrom, and drip or flow into the interior of a cabin. Oncesaturated, a moisture-management device may not return to its originaleffectiveness for a prolonged period of time.

Also, during manufacture of a moisture management device, such as anabsorbing sheet of material, the moisture management device may becompressively rolled or stacked in relation to other moisture managementdevices. As the moisture management device is compressed, internalabsorbing space within the moisture management device is alsocompressed, which may reduce the ability of the moisture managementdevice to absorb and retain moisture. Further, as the moisturemanagement device is compressed, its effectiveness may decrease.

Accordingly, a need exists for a more efficient moisture managementdevice.

SUMMARY OF THE DISCLOSURE

Embodiments of the present disclosure provide environmental aspectcontrol assemblies that are configured to transition between expandedand compressed states in response to changing environmental conditions,such as changes in temperature and/or pressure.

Certain embodiments of the present disclosure provide an environmentalaspect control assembly configured to control one or more environmentalaspects, such as moisture, sound, and/or temperature. The environmentalaspect control assembly may include at least one aspect-controllingportion (such as a structure) formed of one or more environmentalaspect-controlling materials, and at least one shape-changing actuatoroperatively connected to the aspect-controlling structure(s). Theshape-changing actuator(s) is configured to have a first actuator shapeat a first temperature and a second actuator shape at a secondtemperature that differs from the first temperature. The first actuatorshape causes the aspect-controlling structure(s) to form a firststructural shape. For example, the first actuator shape may compress theaspect-controlling structure(s) into the first structural shape.Optionally, the first actuator shape may expand the aspect-controllingstructure(s) into an expanded (for example, increased fluffiness, whichmay relate to increased thickness and/or volume, and/or decreaseddensity) shape. The second actuator shape causes the aspect-controllingstructure(s) to form a second structural shape that differs from thefirst structural shape. For example, the second actuator shape mayexpand the aspect-controlling structure(s) into the second structuralshape. Optionally, the second actuator shape may compress theaspect-controlling structure(s) into a compressed shape, which may becharacterized by decreased thickness, decreased volume, and/or increaseddensity. As such, the first structural shape may be one of an expandedor compressed structural shape, while the second structural shape may bethe other of the expanded or compressed structural shape.

In at least one embodiment, the environmental aspect-controllingmaterial includes aramid felt that is configured to absorb moisture. Inat least one embodiment, the environmental aspect-controlling materialincludes open-cell foam that is configured to absorb sound. In at leastone embodiment, the environment aspect-controlling material includesfiberglass insulation that is configured to trap air, for example, inorder to manage temperature.

The shape-changing actuator(s) may include one or more of a wire, frame,filament, beam, cage, panel, strip, mesh, sheet, coil, and/or the likethat is formed of a shape memory alloy. The shape memory alloy may be atwo-way shape memory alloy. Alternatively, the shape memory alloy may bea one-way shape memory alloy. Optionally, the shape-changing actuator(s)may be formed of one or more shape memory polymers, bimetallic and/orother multiple-component materials.

In at least one embodiment, the aspect-controlling structure(s) mayinclude a first layer configured to control moisture, a second layerconfigured to control sound, and a third layer configured to controltemperature. Alternatively, the aspect-controlling structure may includeone or more layers in which each layer is configured to controlmoisture, sound, and/or temperature.

The shape-changing actuator(s) may be secured around at least a portionof the aspect-controlling structure(s). In at least one otherembodiment, the shape-changing actuator(s) may be embedded within theaspect-controlling structure(s). In still another embodiment, theshape-changing actuator(s) may include a plurality of shape-changingfilaments, and the aspect-controlling structure(s) may include aplurality of aspect-controlling fibers. Each of the shape-changingfilaments is connected to at least one of the aspect-controlling fibers.

Certain embodiments of the present disclosure provide a system that mayinclude a main system structure that includes one or more environmentalaspect control assemblies. Each of the environmental aspect controlassemblies may include at least one aspect-controlling structure formedof an environmental aspect-controlling material, and at least oneshape-changing actuator operatively connected to the aspect-controllingstructure(s). The shape-changing actuator(s) is configured to have afirst actuator shape at a first temperature and a second actuator shapeat a second temperature that differs from the first temperature. Thefirst actuator shape causes the aspect-controlling structure(s) to forma first structural shape, and the second actuator shape causes theaspect-controlling structure(s) to form a second structural shape thatdiffers from the first structural shape. Each environmental aspectcontrol assembly may automatically adapt to an environment based onchanges in temperature and/or pressure.

In at least one embodiment, the system includes a vehicle (such as aland, sea, air, or space based vehicle) in which the main systemstructure includes a frame, fuselage, or the like having an internalcabin. In at least one other embodiment, the system includes an articleof clothing having an insulating layer between inner and outer layers.The environmental aspect control assembly or assemblies are disposedwithin and/or on the insulating layer.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a perspective view of an environmental aspect controlassembly in an expanded state, according to an embodiment of the presentdisclosure.

FIG. 2 illustrates an end view of an environmental aspect controlassembly in an expanded state, according to an embodiment of the presentdisclosure.

FIG. 3 illustrates a perspective view of an environmental aspect controlassembly in a compressed state, according to an embodiment of thepresent disclosure.

FIG. 4 illustrates an end view of an environmental aspect controlassembly in a compressed state, according to an embodiment of thepresent disclosure.

FIG. 5 illustrates an end view of an environmental aspect controlassembly in an expanded state, according to an embodiment of the presentdisclosure.

FIG. 6 illustrates a perspective view of an environmental aspect controlassembly in an expanded state, according to an embodiment of the presentdisclosure.

FIG. 7 illustrates an end view of an environmental aspect controlassembly in a compressed state, according to an embodiment of thepresent disclosure.

FIG. 8 illustrates a simplified cross-sectional view of an environmentalaspect control assembly in an expanded state, according to an embodimentof the present disclosure.

FIG. 9 illustrates a simplified cross-sectional view ofaspect-controlling structures connected to compressed shape-changingactuators, according to an embodiment of the present disclosure.

FIG. 10 illustrates a perspective view of an environmental aspectcontrol assembly in an expanded state, according to an embodiment of thepresent disclosure.

FIG. 11 illustrates a perspective view of an environmental aspectcontrol assembly in a compressed state, according to an embodiment ofthe present disclosure.

FIG. 12 illustrates a perspective top view of an aircraft, according toan embodiment of the present disclosure.

FIG. 13 illustrates a perspective internal view of a portion of afuselage of an aircraft, according to an embodiment of the presentdisclosure.

FIG. 14 illustrates a perspective internal view of a passenger cabin ofan aircraft, according to an embodiment of the present disclosure.

FIG. 15 illustrates a perspective view of ceiling panels within apassenger cabin of an aircraft, according to an embodiment of thepresent disclosure.

FIG. 16 illustrates a flow chart of a method of operating anenvironmental aspect control assembly within an aircraft, according toan embodiment of the present disclosure.

FIG. 17 illustrates a front view of clothing, according to an embodimentof the present disclosure.

FIG. 18 illustrates a cross-sectional view of clothing material,according to an embodiment of the present disclosure.

FIG. 19 illustrates a top view of a blanket, according to an embodimentof the present disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

The foregoing summary, as well as the following detailed description ofcertain embodiments will be better understood when read in conjunctionwith the appended drawings. As used herein, an element or step recitedin the singular and proceeded with the word “a” or “an” should beunderstood as not excluding plural of the elements or steps, unless suchexclusion is explicitly stated. Further, references to “one embodiment”are not intended to be interpreted as excluding the existence ofadditional embodiments that also incorporate the recited features.Moreover, unless explicitly stated to the contrary, embodiments“comprising” or “having” an element or a plurality of elements having aparticular property may include additional elements not having thatproperty.

Embodiments of the present disclosure provide environmental aspectcontrol assemblies that are configured to control one or moreenvironmental aspects. Examples of environmental aspects include, butare not limited to, moisture control, sound dampening or attenuation,temperature, and the like. Each environmental aspect control assemblymay include an aspect-controlling structure that is operativelyconnected to a shape-changing actuator.

The aspect-controlling structure may include a structure, such as asheet, panel, strip, beam, mesh, frame, aggregate, or the like formed ofan environmental aspect-controlling material. For example, amoisture-controlling environmental aspect control assembly may include asheet, panel, strip, beam, or the like formed of an aramid felt that isconfigured to absorb moisture. A sound-attenuating environmental aspectcontrol assembly may include a sheet, panel, strip, beam, mesh, frame,aggregate, or the like formed of a sound-dampening material, suchopen-cell foam, cork, rubber, or the like. A temperature-controllingenvironmental aspect control assembly may include a sheet, panel, strip,beam, or the like formed of an insulating material, such as encasedgoose down, fiberglass insulation, or the like.

The shape-changing actuator may include a structure formed of a shapememory alloy, and/or a shape memory polymer. For example, theshape-changing actuator may include a wire, frame, filament, beam,panel, cage, strip, sheet, or the like that is operatively connected tothe aspect-controlling structure. The shape-changing actuator isconfigured to change shapes in response to a change in temperatureand/or pressure. As the shape-changing actuator changes shape, theaspect-controlling structure changes shape in response thereto. Forexample, at a first temperature (such as a compression transitiontemperature), the shape-changing actuator may have a first shape thatconstricts around the aspect-controlling structure and therebycompresses or squeezes the aspect-controlling structure. At a secondtemperature (such as an expansion transition temperature), theshape-changing actuator may have a second shape that expands theaspect-controlling structure. For example, the shape-changing actuatormay outwardly pull and/or push the aspect-controlling structure, therebyincreasing the fluffiness of the aspect-controlling structure. The shapeof the shape-changing actuator may gradually transition from the firsttemperature to the second temperature, thereby gradually expanding theaspect-controlling structure. Alternatively, the shape of theshape-changing actuator may instantaneously transition at specifictransition temperatures. The first temperature may exceed the secondtemperature. Alternatively, the second temperature may exceed the firsttemperature.

A shape memory alloy is an alloy that has an original shape. Whendeformed, the shape memory alloy returns to the original shape upon achange in temperature. For example, after being deformed, the shapememory alloy returns to the original shape as it is subjected to anincreasing temperature. Alternatively, the shape memory alloy may returnto the original shape as it is subjected to a decreasing temperature.

Examples of shape memory alloys include nickel-titanium, andcopper-aluminum-nickel. Other examples of shape memory alloys may beformed from alloys of zinc, copper, gold, and iron. Nickel-titanium, forexample, changes from austenite to martensite upon cooling.

The shape memory alloy may be a one-way shape memory alloy, or a two-wayshape memory alloy. For example, when a one-way shape memory alloy is ina cold state, the shape memory alloy may be bent or stretched and retainsuch shape until heated above a transition temperature. Upon heating,the shape changes to the original shape. When the one-way shape memoryalloy cools, it remains in the original shape until it is activelydeformed again.

In contrast, a two-way shape memory alloy actively transitions betweentwo different shapes. For example, at a low temperature, the two-wayshape memory alloy is in a first shape, while at a high temperature, thetwo-way shape memory is in a second shape that differs from the firstshape. The changing shapes are obtained through the change intemperature without an external force (for example, an external physicalforce, such as a mechanical compression) being exerted into thematerial.

FIG. 1 illustrates a perspective view of an environmental aspect controlassembly 100 in an expanded state, according to an embodiment of thepresent disclosure. The environmental aspect control assembly 100includes an aspect-controlling portion, such as an aspect-controllingstructure 102, and a shape-changing actuator 104 operatively connectedto an outside surface of the aspect-controlling structure 102.

The aspect-controlling structure 102 may be formed of an aramid feltbeam that is configured to absorb moisture. While the aspect-controllingstructure 102 is shown as a beam, the aspect-controlling structure 102may be various other shapes, such as a sheet, panel, sphere, or variousother shapes and sizes.

The aspect-controlling structure 102 includes a main body 106 havingopposed ends 108 connected to opposed sides 110 and opposed upper andlower surfaces 112 and 114. The main body 106 defines an internalstructure that may be formed of fibers, such as aramid fibers, and airpockets.

The shape-changing actuator 104 may be formed of a single piece of shapememory alloy wire 116 that may wrap around outer surfaces of theaspect-controlling structure 102. For example, the wire 116 may beformed of a two-way shape memory alloy, such as nickel-titanium. Atleast portions of the wire 116 may be secured to outer surfaces of theaspect-controlling structure 102 through bonding, fasteners, brackets,and/or the like. As such, movement of the shape-changing actuator 104causes a corresponding movement in the aspect-controlling structure 102.Alternatively, the wire 116 may be formed of at least one shape memorypolymer. Also, alternatively, the shape-changing actuator 104 may beformed of a combination of at least one shape memory alloy and at leastone shape memory polymer.

FIG. 2 illustrates an end view of the environmental aspect controlassembly 100 in the expanded state, according to an embodiment of thepresent disclosure. As shown, the main body 106 includes an internalstructure 118 that may include a plurality of fibers 120 and air pockets122. In the expanded state, the aspect-controlling structure 102 may befully-expanded to a maximum height 126, a maximum width 128, and amaximum length 130 (shown in FIG. 1 ). Alternatively, in thefully-expanded state, the shape-changing actuator 104 may contain theaspect-controlling structure 102 so that it is not at a maximum height,a maximum width, and a maximum length.

The shape-changing actuator 104 may be defined by an expanded shape, asshown in FIGS. 1 and 2 , at a first temperature, such as a cooltemperature (for example, below 40° F.). In general, the shape-changingactuator 104 may abut a surface that is proximate to a space that issusceptible to temperature fluctuations. For example, the shape-changingactuator 104 may be secured to an inner surface of an outer wall of afuselage of an airplane. The environmental aspect control assembly 100may be on board an aircraft, attached to or within fittings, cabinwalls, or the like, where the first temperature is reached at analtitude that is 10,000 feet above sea level, for example. As such,during the flight, the environmental aspect control assembly 100 is at afully-expanded state during most of the flight. As the aircraft descendsbelow 10,000 feet, the shape-changing actuator 104 is subjected to anincreased temperature. As the aircraft reaches a transition temperature,such as 70° F., for example, the environmental aspect control assembly100 transitions to a compressed state, as the shape-changing actuator104 squeezes and compresses the aspect-controlling structure 102.

In the expanded state, the shape-changing actuator 104 is in an expandedactuator shape, which causes the aspect-controlling structure 102 to bein an expanded structural shape. For example, as the shape-changingactuator 104 expands to the expanded actuator shape, theaspect-controlling structure 102 expands to the expanded structuralshape in response to the expansion of the shape-changing actuator 104.

The shape of the shape-changing actuator 104 as shown in FIGS. 1 and 2is merely exemplary. It is to be understood that the expanded shape maybe various other shapes, sizes, and configurations.

FIG. 3 illustrates a perspective view of the environmental aspectcontrol assembly 100 in a compressed state, according to an embodimentof the present disclosure. In the compressed state, the shape-changingactuator 104 constricts around the aspect-controlling structure 102,thereby squeezing or otherwise compressing the aspect-controllingstructure 102. The constricting shape of the shape-changing actuator 104as shown is merely exemplary. It is to be understood that theconstricting shape that compresses the aspect-controlling structure 102may be various other shapes and sizes. For example, the shape-changingactuator 104 may include collapsible segments that collapse in thecompressed state, similar to bellows, for example.

FIG. 4 illustrates an end view of the environmental aspect controlassembly 100 in the compressed state, according to an embodiment of thepresent disclosure. As shown, in the compressed state, the fibers 120are compressed together, which reduces the size of the air pockets 122.In the compressed state, the shape-changing actuator 104 constrictsaround and compresses the aspect-controlling structure 102 and reducesone or more of the height, width, and/or length of theaspect-controlling structure 102.

The shape-changing actuator 104 may be defined by a compressed shape, asshown in FIGS. 3 and 4 , at the second temperature, such as a warmtemperature (for example, above 70° F.). As noted, the environmentalaspect control assembly 100 may be on board an aircraft, attached to orwithin fittings, cabin walls, or the like, where the second temperatureis reached at sea level or otherwise below an of 10,000 feet above sealevel, for example. As such, when grounded, the environmental aspectcontrol assembly 100 is in a compressed state. As the aircraft ascendsabove sea level, the shape-changing actuator 104 is subjected todecreasing temperature. As the aircraft reaches a transitiontemperature, such as 40° F., for example, the environmental aspectcontrol assembly 100 transitions to the expanded state, as theshape-changing actuator 104 expands and the aspect-controlling structure102 outwardly expands in response thereto.

In the compressed state, the shape-changing actuator 104 is in acompressed actuator shape, which causes the aspect-controlling structure102 to be in a compressed structural shape. For example, as theshape-changing actuator 104 compresses to the compressed actuator shape,the aspect-controlling structure 102 compresses to the compressedstructural shape in response to the exerted compression of theshape-changing actuator 104.

As noted, the aspect-controlling structure 102 may be formed of amaterial configured to absorb moisture. For example, theaspect-controlling structure 102 may be formed of aramid felt cloth. Inthe expanded state, the aspect-controlling structure 102 is able toabsorb moisture. As the environmental aspect control assembly 100 issubjected to a first transition temperature, such as a warm temperature,the shape-changing actuator 104 constricts around the aspect-controllingstructure 102, which squeezes the moisture out of the aspect-controllingstructure 102. The moisture may then be drained through a drainagesystem, such as within an aircraft. As such, the environmental aspectcontrol assembly 100 automatically sheds stored water in the compressedstate. Therefore, an individual does not need to manually wring theaspect control assembly 100 to remove the stored water, as is the casewith standard moisture absorbing devices. As such, embodiments of thepresent disclosure may not rely solely on a natural evaporation processto dry the aspect control assembly 100, thereby saving considerableamounts of time.

Accordingly, as an aircraft is airborne, the environmental aspectcontrol assembly 100 may be in an expanded state and able to absorbmoisture within the aircraft. On the ground, however, the environmentalaspect control assembly 100 may be in a compressed state in which themoisture within the aspect-controlling structure 102 is squeezed out anddrained out of the aircraft. Because the shape-changing actuator 104 maybe formed from a two-way shape memory alloy, the environmental aspectcontrol assembly 100 automatically transitions between the compressedand expanded states in response to changes in temperature (for example,changes between an expansion temperature, at which the environmentalaspect control assembly 100 is fully expanded, and a compressiontemperature, at which the environmental aspect control assembly 100 isfully compressed). In this manner, the environmental aspect controlassembly 100 automatically adapts to changing environmental conditions.

Alternatively, the aspect-controlling structure 102 may be formed of amaterial that is configured to attenuate or dampen sound energy. Forexample, the aspect-controlling structure 102 may be formed of open-cellfoam, cork, rubber, a polymer-based fibers (such as Kevlar, fiberglass,ultem, and the like), or the like. As an airplane is airborne, such asat a cruising altitude, the aspect-controlling structure 102 may befully-expanded, which generally maximizes its sound-absorptivecapabilities. On the ground, an aircraft may generate a first level ofsound, which may be less than a second level of sound generated by theaircraft when airborne. Therefore, less sound absorption may be neededon the ground as compared to when an aircraft is airborne. Accordingly,a sound-absorbing aspect-controlling structure 102 may be in an expandedstate while airborne, and a compressed state while on the ground.

Further, during manufacture, a sound-absorbing aspect-controllingstructure 102 may not be easily secured within a confined space, such aswithin a boundary wall within an interior cabin of an aircraft.Therefore, the aspect-controlling structure 102 may be formed of aone-way shape memory alloy and/or shape memory polymer so that theenvironmental aspect control assembly 100 may be compressed as it isinserted into position during a manufacturing process, and then expanded(such as through application of heat) to fit securely within aparticular area or volume.

Also, alternatively, the aspect-controlling structure 102 may be formedof an insulating material, such as fiberglass. As an airplane isairborne, such as at a cruising altitude in which ambient temperaturesare low, the aspect-controlling structure 102 may be fully-expanded,which generally maximizes its heat-insulating properties. At groundlevel, in which the ambient temperature is warmer, theaspect-controlling structure is compressed, which reduces itsheat-insulating properties. In this manner, the environmental aspectcontrol assembly 100 may automatically adapt to increased insulatingcapabilities as the ambient temperature drops.

Also, during manufacture, an insulating aspect-controlling structure 102may not be easily secured within a confined space, such as within aboundary wall within an interior cabin of an aircraft. Therefore, theaspect-controlling structure 102 may be formed of a one-way shape memoryalloy and/or shape memory polymer so that the environmental aspectcontrol assembly 100 may be compressed as it is inserted into positionduring a manufacturing process, and then expanded (such as throughapplication of heat) to fit securely within a particular area or volume.

In at least one embodiment, the aspect-controlling structure 102 may beformed of one or more materials that are configured to absorb moisture,dampen or attenuate sound, and provide insulation. For example, theaspect-controlling structure 102 may include a first layer that isconfigured to absorb moisture, a second layer that is configured toattenuate sound, and a third layer that is configured to provideinsulation.

As noted, the shape-changing actuator 104 may be formed of a one wayshape memory alloy. During manufacture, a fully-expanded environmentalaspect control assembly 100 may be difficult to fit within a confinedspace. As such, the shape-changing actuator 104 may be inserted into aconfined space in a compressed state, such as at a first temperature. Inorder to expand the aspect control assembly 100 to an expanded statethat securely fits within the confined space, the environmental aspectcontrol assembly 100 is subjected to a transition temperature, either ahigh or low transition temperature, thereby causing the shape-changingactuator 104 to expand, which causes the aspect-controlling structure102 to expand in response thereto. As such, the environmental aspectcontrol assembly 100 may securely lodge in position due to the change intemperature. Because the shape-changing actuator 104 is formed of a oneway shape memory alloy, the environmental aspect control assembly 100does not compress in response to a subsequent change in temperature.

FIG. 5 illustrates an end view of an environmental aspect controlassembly 150 in an expanded state, according to an embodiment of thepresent disclosure. The environmental aspect control assembly 150 issimilar to the environmental aspect control assembly 100 (shown in FIGS.1-4 ) and includes an aspect-controlling structure 152 and ashape-changing actuator 154 operatively connected to theaspect-controlling structure 152. The aspect-controlling structure 152may include a moisture absorbing layer 156 (such as formed of aramidfelt cloth) stacked on a sound-absorbing layer 158 (such as formed ofopen-cell foam), which is, in turn stacked on an insulating layer 160(such as formed of fiberglass). Alternatively, the layers 156, 158, and160 may be stacked in different configurations than shown.

FIG. 6 illustrates a perspective view of an environmental aspect controlassembly 200 in an expanded state, according to an embodiment of thepresent disclosure. The environmental aspect control assembly 200 issimilar to those described above, except that a shape-changing actuator202 is positioned within an aspect-controlling structure 204. Theshape-changing actuator 202 may be embedded within theaspect-controlling structure 204. For example, the aspect-controllingstructure 204 may be molded or bonded around the shape-changing actuator202. Accordingly, as the shape-changing actuator 202 changes shapes inresponse to temperature changes, as described above, theaspect-controlling structure 204 changes shape in response to thechanging shape of the shape-changing actuator 202.

FIG. 7 illustrates an end view of the environmental aspect controlassembly 200 in a compressed state, according to an embodiment of thepresent disclosure. As the shape-changing actuator 202 inwardlycompresses or collapses (in one or more directions, such as compressionfrom one or more of top, bottom, and/or lateral directions) in responseto a compression transition temperature, the aspect-controllingstructure 204 is drawn inwardly in the directions of arrows 206. As theshape-changing actuator 202 outwardly expands in response to anexpansion transition temperature, the shape-changing actuator 202 pushesthe aspect-controlling structure 204.

FIG. 8 illustrates a simplified cross-sectional view of an environmentalaspect control assembly 300 in an expanded state, according to anembodiment of the present disclosure. The environmental aspect controlassembly 300 is similar to those described above, except that, insteadof a shape-changing actuator being secured around an aspect-controllingstructure (or an aspect-controlling structure being formed around ashape-changing actuator), the environmental control assembly 300 mayinclude a plurality of aspect-controlling structures 302 in the form ofmaterial fibers (for example, aramid fibers, fiberglass segments,Gore-Tex, wool, denim, or the like) connected together throughindividual shape-changing actuators 304. Each shape-changing actuator304 may be in the shape of a filament that is interwoven with the fibersof the aspect controlling structures 302. As such, the environmentalaspect control assembly 300 may be a composite material that includesindividual aspect-controlling structures 302 integrally formed withindividual shape-changing actuators 304.

In the expanded state, each shape-changing actuator 304 may be a planarmember, such as a wire, beam, strip, or the like. When a compressiontransition temperature is reached, the shape-changing actuators 304compress and draw the aspect-controlling structures 302 together, whichreduces the spaces therebetween and may compress each aspect-controllingstructure 302.

FIG. 9 illustrates a simplified cross-sectional view of theaspect-controlling structures 302 connected to compressed shape-changingactuators 304, according to an embodiment of the present disclosure. Asshown, as a compression transition temperature is reached, eachshape-changing actuator 304 inwardly collapses, such as into anaccordion or bellows shape, which draws adjacent aspect-controllingstructures 302 that connect to each shape-changing actuator 304 towardone another.

FIG. 10 illustrates a perspective view of an environmental aspectcontrol assembly 400 in an expanded state, according to an embodiment ofthe present disclosure. The environmental aspect control assembly 400 issimilar to those described above, except that a shape-changing actuator402 is in the form of a sheet 404 that overlays an aspect-controllingstructure 406. In the expanded state, the sheet 404 may be flat. Assuch, the aspect-controlling structure 406 may be flat andfully-extended.

FIG. 11 illustrates a perspective view of the environmental aspectcontrol assembly 400 in a compressed state, according to an embodimentof the present disclosure. As the environmental aspect control assembly400 is subjected to a compression transition temperature, the sheet 404curls inwardly in the shape of a C, and curls and compresses theaspect-controlling structure 406 between an inner surface 408 of theformed C.

Referring to FIGS. 1-11 , the shape-changing actuators and theaspect-controlling structures may be various shapes and sizes, includingthose not shown. For example, a plurality of shape-changing actuators inthe form of individual strips may be positioned on or in anaspect-controlling structure. The individual strips may or may not beconnected to one another. Additionally, a shape-changing actuator may bein the form of a curved or spiraled coil that wraps around anaspect-controlling structure in the form of a cylinder.

Embodiments of the present disclosure provide environmental aspectcontrol assemblies that may be used with a variety of systems, devices,apparatus, goods, articles of manufacture, and the like. For example,one or more environmental aspect control assemblies may be securedwithin various portions of an aircraft, automobile, train, or other suchvehicle. Additionally, one or more environmental aspect controlassemblies may be secured within a lining of a coat, blanket, sleepingbag, or the like.

FIG. 12 illustrates a perspective top view of an aircraft 540, accordingto an embodiment of the present disclosure. The aircraft 540 is anexample of a system having a main system structure 541 that may includeone or more environmental aspect control assemblies, as described above.The aircraft 540 may include a propulsion system 552 that may includetwo turbofan engines 554. The engines 554 are carried by the wings 544of the aircraft 540. In other embodiments, the engines 554 may becarried by a fuselage 542 and/or the empennage 556. The empennage 556may also support horizontal stabilizers 548 and a vertical stabilizer550.

FIG. 13 illustrates a perspective internal view of a portion of afuselage 600 of an aircraft, according to an embodiment of the presentdisclosure. The fuselage 600 defines an internal chamber 602 that mayinclude structural supports, such as beams 604 and cross beams 606 thatsupport panels. Environmental aspect control assemblies 608 may besecured around joints on or between beams 604 and 606. Further,environmental aspect control assemblies 610 in the form of insulatingpanels may be positioned underneath structural panels (hidden fromview). The environmental aspect control assemblies 608 may be used tocontrol various environmental aspects, such as moisture, sound,temperature, and/or the like. The environmental aspect controlassemblies 608 may transition from or between first and second states inresponse to changes in temperature, as described above.

FIG. 14 illustrates a perspective internal view of a passenger cabin 700of an aircraft, according to an embodiment of the present disclosure.The passenger cabin 700 includes an outer wall 702 that defines one ormore windows 704. For the sake of clarity, an inner covering wall is notshown in FIG. 14 . An environmental aspect control assembly 706, in theform of a material strip, may be wrapped around a portion of anelectrical cable 708. Further, one or more environmental aspect controlassemblies 710 in the form of insulation panels may be secured betweenthe outer wall 702 and the inner covering wall.

FIG. 15 illustrates a perspective view of ceiling panels 800 within apassenger cabin 802 of an aircraft, according to an embodiment of thepresent disclosure. A plurality of environmental aspect controlassemblies 804, in the form of linear strips, may be secured around orotherwise to portions of the ceiling panels 800.

FIG. 16 illustrates a flow chart of a method of operating anenvironmental aspect control assembly within an aircraft, according toan embodiment of the present disclosure. At 900, an environmental aspectcontrol assembly is secured to a portion of an aircraft. Any of theenvironmental aspect control assemblies may be secured to variousportions of the aircraft, such as any of those locations describedabove.

At 902, it is determined whether the aircraft is grounded, such as whenparked at a gate. If so, the method proceeds to 904, in which theenvironmental aspect control assembly is compressed in response to atemperature being above a compression transition temperature. If, forexample, the environmental aspect control assembly is configured toabsorb moisture, during the compression, water may be shed from theenvironmental aspect control assembly and channeled to a drainage systemwithin the aircraft. Alternatively, at 904, the environmental aspectcontrol assembly may be expanded in response to a temperature beingabove (or alternatively below) an expansion transition temperature.

If, however, the aircraft is not grounded, the method proceeds to 906,in which it is determined if the temperature is below an expansiontransition temperature. If not, the method proceeds to 908, in which thecurrent shape of the environmental aspect control assembly ismaintained. Optionally, the shape of the environmental aspect controlassembly may gradually expand as the temperature decreases toward theexpansion transition temperature.

If the temperature is below the expansion transition temperature, themethod proceeds to 910, in which the environmental aspect controlassembly expands in response to the temperature being below theexpansion transition temperature. Alternatively, the environmentalaspect control assembly may be configured to compress in response to thetemperature being below (or alternatively above) a compressiontransition temperature.

FIG. 17 illustrates a front view of clothing 1000, according to anembodiment of the present disclosure. The clothing 1000 is an example ofa system having a main system structure 1001 that may include one ormore environmental aspect control assemblies, as described above. Theclothing may be a shirt or outwear, such as a jacket or coat 1002 formedof material 1004. Alternatively, the clothing may be gloves, a hat, ascarf, or the like.

FIG. 18 illustrates a cross-sectional view of the clothing material1004, according to an embodiment of the present disclosure. The clothingmaterial 1004 may include an inner layer 1006 and an outer layer 1008.An insulating layer 1110 is sandwiched between the inner and outerlayers 1006 and 1008, respectively. The insulating layer 1110 mayinclude one or more environmental aspect control assemblies 1112, suchas any of those described above. For example, the environmental aspectcontrol assembly 1112 may include a shape-changing actuator 1114operatively connected to an aspect-controlling structure 1116, such asan encased layer of goose down. As the temperature decreases, theshape-changing actuator 1114 expands, which causes theaspect-controlling structure 1116 to expand in response thereto. Incontrast, as the temperature increases, the shape-changing actuator 1114compresses, thereby causing the aspect-controlling structure 1116 tocompress in response thereto. Accordingly, the environmental aspectcontrol assembly 1112 automatically adapts to changes in temperature. Inresponse to cooler temperatures, the environmental aspect controlassembly 1112 expands to provide increased insulation. In response towarmer temperatures, the environmental aspect control assembly 1112compresses to provide decreased insulation.

A material may compress in that it may decrease in linear distancebetween two or more given points within and/or on the material.Conversely, a material may expand in that it may increase in lineardistance between two more given points within and/or on the material.

FIG. 19 illustrates a top view of a blanket or sleeping bag 1200,according to an embodiment of the present disclosure. The blanket 1200is an example of a system having a main system structure 1201 that mayinclude one or more environmental aspect control assemblies, asdescribed above. The blanket 1200 may include inner and outer layersthat sandwich an insulating layer, as described above with respect toFIG. 18 . One or more environmental aspect control assemblies may besecured within the insulating layer.

As described above, embodiments of the present disclosure provideefficient environmental aspect control assemblies. The environmentalaspect control assemblies may be configured to control one or moreenvironmental aspects, such as moisture (for example, moistureabsorption), sound (for example, sound attenuation or dampening), andtemperature (for example, variable insulation).

Embodiments of the present disclosure provide an environmental aspectcontrol assembly that may be used in or on an aircraft. Theenvironmental aspect control assembly may be configured to passively aidor promote evaporation by expelling moisture of liquids from absorbentmaterials (such as an aramid felt cloth) in a compressed state. Atemperature differential between a cruise altitude and ground (forexample, sea level) transitions the environmental aspect controlassembly between expanded and compressed states. Embodiments of thepresent disclosure provide a moisture management device in the form ofan environmental aspect control assembly that is lighter and less costlythan various known moisture management devices that are used inaircraft.

While various spatial and directional terms, such as top, bottom, lower,mid, lateral, horizontal, vertical, front and the like may be used todescribe embodiments of the present disclosure, it is understood thatsuch terms are merely used with respect to the orientations shown in thedrawings. The orientations may be inverted, rotated, or otherwisechanged, such that an upper portion is a lower portion, and vice versa,horizontal becomes vertical, and the like.

As used herein, a structure, limitation, or element that is “configuredto” perform a task or operation is particularly structurally formed,constructed, or adapted in a manner corresponding to the task oroperation. For purposes of clarity and the avoidance of doubt, an objectthat is merely capable of being modified to perform the task oroperation is not “configured to” perform the task or operation as usedherein.

It is to be understood that the above description is intended to beillustrative, and not restrictive. For example, the above-describedembodiments (and/or aspects thereof) may be used in combination witheach other. In addition, many modifications may be made to adapt aparticular situation or material to the teachings of the variousembodiments of the disclosure without departing from their scope. Whilethe dimensions and types of materials described herein are intended todefine the parameters of the various embodiments of the disclosure, theembodiments are by no means limiting and are exemplary embodiments. Manyother embodiments will be apparent to those of skill in the art uponreviewing the above description. The scope of the various embodiments ofthe disclosure should, therefore, be determined with reference to theappended claims, along with the full scope of equivalents to which suchclaims are entitled. In the appended claims, the terms “including” and“in which” are used as the plain-English equivalents of the respectiveterms “comprising” and “wherein.” Moreover, the terms “first,” “second,”and “third,” etc. are used merely as labels, and are not intended toimpose numerical requirements on their objects. Further, the limitationsof the following claims are not written in means-plus-function formatand are not intended to be interpreted based on 35 U.S.C. § 112(f),unless and until such claim limitations expressly use the phrase “meansfor” followed by a statement of function void of further structure.

This written description uses examples to disclose the variousembodiments of the disclosure, including the best mode, and also toenable any person skilled in the art to practice the various embodimentsof the disclosure, including making and using any devices or systems andperforming any incorporated methods. The patentable scope of the variousembodiments of the disclosure is defined by the claims, and may includeother examples that occur to those skilled in the art. Such otherexamples are intended to be within the scope of the claims if theexamples have structural elements that do not differ from the literallanguage of the claims, or if the examples include equivalent structuralelements with insubstantial differences from the literal languages ofthe claims.

What is claimed is:
 1. An environmental aspect control assemblyconfigured to control one or more environmental aspects, theenvironmental aspect control assembly comprising: at least oneaspect-controlling portion formed of one or more environmentalaspect-controlling materials; and a shape-changing actuator operativelyconnected to the at least one aspect-controlling portion, wherein theshape-changing actuator is not electrically connected, wherein theshape-changing actuator automatically adapts to changing environmentalconditions by having a first actuator shape at a first ambienttemperature and a second actuator shape at a second ambient temperaturethat differs from the first ambient temperature, wherein theshape-changing actuator changes shape in response to changes between thefirst ambient temperature and the second ambient temperature, whereinthe first actuator shape causes the at least one aspect-controllingportion to form a first structural shape, wherein the second actuatorshape causes the at least one aspect-controlling portion to form asecond structural shape that differs from the first structural shape,wherein the first structural shape is one of an expanded or compressedstructural shape, wherein the second structural shape is the other ofthe expanded or compressed structural shape, wherein the shape-changingactuator consists of a single piece of wire having a plurality ofwindings that wrap around or within the at least one aspect-controllingportion, and wherein the plurality of windings squeeze and constrict theat least one aspect-controlling portion in the compressed structuralshape.
 2. The environmental aspect control assembly of claim 1, whereinthe one or more environmental aspects comprises one or more of moisture,sound, or temperature.
 3. The environmental aspect control assembly ofclaim 1, wherein the one or more environmental aspect-controllingmaterials includes aramid felt that is configured to absorb moisture. 4.The environmental aspect control assembly of claim 1, wherein the one ormore environmental aspect-controlling materials includes open-cell foamthat is configured to absorb sound.
 5. The environmental aspect controlassembly of claim 1, wherein the one or more environmentalaspect-controlling materials includes fiberglass insulation.
 6. Theenvironmental aspect control assembly of claim 1, wherein theshape-changing actuator is formed of a shape memory alloy.
 7. Theenvironmental aspect control assembly of claim 6, wherein the shapememory alloy is a two-way shape memory alloy.
 8. The environmentalaspect control assembly of claim 1, wherein the at least oneaspect-controlling portion comprises: a first layer configured tocontrol moisture; a second layer configured to control sound; and athird layer configured to control temperature.
 9. The environmentalaspect control assembly of claim 1, wherein the shape-changing actuatoris secured around at least a portion of the at least oneaspect-controlling portion.
 10. The environmental aspect controlassembly of claim 1, wherein the shape-changing actuator is embeddedwithin the at least one aspect-controlling portion.
 11. Theenvironmental aspect control assembly of claim 1, wherein the at leastone aspect-controlling portion comprises a plurality ofaspect-controlling fibers connected to a plurality of aspect-controllingfibers.
 12. A system comprising: a main system structure that includesone or more environmental aspect control assemblies, wherein each of theenvironmental aspect control assemblies comprises (a) at least oneaspect-controlling portion formed of one or more environmentalaspect-controlling materials; and (b) a shape-changing actuatoroperatively connected to the at least one aspect-controlling portion,wherein the shape-changing actuator is not electrically connected,wherein the shape-changing actuator automatically adapts to changingenvironmental conditions by having a first actuator shape at a firstambient temperature and a second actuator shape at a second ambienttemperature that differs from the first ambient temperature, wherein theat shape-changing actuator changes shape in response to changes betweenthe first ambient temperature and the second ambient temperature,wherein the first actuator shape causes the at least oneaspect-controlling portion to form a first structural shape, wherein thesecond actuator shape causes the at least one aspect-controlling portionto form a second structural shape that differs from the first structuralshape, wherein the first structural shape is one of an expanded orcompressed structural shape, wherein the second structural shape is theother of the expanded or compressed structural shape, wherein theshape-changing actuator is formed of a single piece of wire having aplurality of windings that wrap around or within the at least oneaspect-controlling portion, and wherein the plurality of windingssqueeze and constrict the at least one aspect-controlling portion in thecompressed structural shape, and wherein the one or more environmentalaspects comprises one or more of moisture, sound, or temperature. 13.The system of claim 12, wherein the system comprises an aircraft, andwherein the main system structure comprises a fuselage having aninternal cabin.
 14. The system of claim 12, wherein the system comprisesan article of clothing having an insulating layer between inner andouter layers, wherein the one or more environmental aspect controlassemblies are disposed within the insulating layer.
 15. The system ofclaim 12, wherein the at least one shape-changing actuator is formed ofa two-way shape memory alloy.
 16. An environmental aspect controlassembly configured to control one or more environmental aspects,wherein the one or more environmental aspects comprises one or more ofmoisture, sound, or temperature, the environmental aspect controlassembly comprising: at least one aspect-controlling portion formed ofone or more environmental aspect-controlling materials; and ashape-changing actuator formed of a shape memory alloy operativelyconnected to the at least one aspect-controlling portion, wherein theshape-changing actuator is not electrically connected, wherein theshape-changing actuator automatically adapts to changing environmentalconditions by having a first actuator shape at a first ambienttemperature and a second actuator shape at a second ambient temperaturethat differs from the first ambient temperature, wherein theshape-changing actuator changes shape in response to changes between thefirst ambient temperature and the second ambient temperature, whereinthe first actuator shape causes the at least one aspect-controllingstructure to form a first structural shape, wherein the second actuatorshape causes the at least one aspect-controlling structure to form asecond structural shape that differs from the first structural shape,wherein the first structural shape is one of an expanded or compressedstructural shape, wherein the second structural shape is the other ofthe expanded or compressed structural shape, wherein the shape-changingactuator consists of a single piece of wire having a plurality ofwindings that wrap around or within the at least one aspect-controllingportion, and wherein the plurality of windings squeeze and constrict theat least one aspect-controlling portion in the compressed structuralshape.
 17. The environmental aspect control assembly of claim 16,wherein the one or more environmental aspect-controlling materialsincludes one or more of: aramid felt that is configured to absorbmoisture; open-cell foam that is configured to absorb sound; orfiberglass insulation.
 18. The system of claim 12, wherein theshape-changing actuator consists of the single piece of wire having theplurality of windings that wrap around or within the at least oneaspect-controlling portion.